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Note 12 - Accrued Closure Costs and ARO - Reported Closure Asset (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2016 | Dec. 31, 2015
Balance | $ 2,575 | $ 2,870
Amortization of closure and post-closure asset | (760) | (152)
Adjustment to closure and post-closure asset | 2,333 | (143)
Balance | $ 4,148 | $ 2,575

X
- Definition Represents the additions or adjustments for the period in the amount of closure and post-closure assets of disposal facilities. + References No definition available. + Details
Name: | pesi_AdditionOrAdjustmentToClousreAndPostClosureAssets
Namespace Prefix: | pesi_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Represents the amortization for the period in the amount of closure and post-closure asset of disposal facilities. + References No definition available. + Details
Name: | pesi_AmortizationOfClosureAndPostClosureAsset
Namespace Prefix: | pesi_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Represents the carrying amount of closure and post closure assets of disposal facilities. + References No definition available. + Details
Name: | pesi_ClosureAndPostClosureAssets
Namespace Prefix: | pesi_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant